Nuclear Magnetic Resonance, Biomolecular nuclear magnetic resonance 8 chemistry 5 unclassified drug 5 Article 4 Molecular Structure 4 molecular dynamics 4 nonhuman 4 Molecular Dynamics Simulation 3 Plant Bark 3 Xanthones 3 article 3 bark 3 carbon nuclear magnetic resonance 3 chemical structure 3 drug isolation 3 drug structure 3 heteronuclear multiple bond correlation 3 plant extract 3 proton nuclear magnetic resonance 3 xanthone derivative 3 Aminopeptidases 2 Animals 2 Calophyllum 2 Clusiaceae 2 Magnetic Resonance Spectroscopy 2 Peptides 2 aminopeptidase 2 animal 2 isolation and purification 2